US3406597A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuously variable ratio transmission system and control system therefor
Assignee: National Research Development Corp UK
•
Filing: 1965-11-26
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Granted: 1968-10-22
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Expires: 1985-11-26
Abstract
No abstract record available.
Inventors
- 👤 Perry Forbes George De Brie
- 👤 Fellows Thomas George
- 👤 Petty John William Ledward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:35
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/66; F16H61/664; F16H61/6648; F16H37/00; F16H37/02; F16H37/06; F16H37/08; F16H37/0833; F16H37/084; F16H37/086; F16H61/02; F16H15/00; F16H15/02; F16H15/04; F16H15/06; F16H15/32; F16H15/36; F16H15/38; F16H2015/383; F16H2037/088; F16H2061/6604; F16H2061/6614; F16H2718/00; F16H2718/08
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-22 | 1972-04-22 | 1972-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-22 | 1976-04-22 | 1976-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-22 | 1980-04-22 | 1980-10-22 | $7700.00 | Window Closed / Lapsed |